document.write( "Question 856145: This was a question on a practice test that I got wrong and I am not sure what I did wrong. Can you please explain to me how to solve this? It would mean a great deal to me!!\r
\n" ); document.write( "\n" ); document.write( "What is the sum of the arithmetic sequence 8, 14, 20 …, if there are 22 terms? \n" ); document.write( "
Algebra.Com's Answer #515774 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
How can we tell you what you did wrong, if you don't show us what you did?
\n" ); document.write( "S = ½(2a + (n-1)d)n
\n" ); document.write( "S = ½(2*8 + (21)6)22
\n" ); document.write( "S = 1562\r
\n" ); document.write( "\n" ); document.write( "or another way
\n" ); document.write( "Find a22
\n" ); document.write( "an = a + (n - 1)d
\n" ); document.write( "a22 = 8 + (21)6
\n" ); document.write( "a22=134
\n" ); document.write( "now find the sum
\n" ); document.write( "S = ½(a + an)n
\n" ); document.write( "S = ½(8 + 134)22
\n" ); document.write( "S = 11(142)
\n" ); document.write( "s=1562\r
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